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Checking the Master/Slave Subrack for Universal Platform Subrack

The equipment supports the master/slave subrack management. To prevent subrack ID conflict and avoid the communication error, set the IDs of the master and slave subracks correctly. The ID of the master or slave subrack is set through the EFI board in the subrack.

Prerequisites

• The NMS server and client should be started normally.

• The master/slave subracks should be installed.

• Fiber connection should be done.

Tools, Equipment, and Materials

U2000

Context

The master subrack and the slave subrack are connected through the ETH1/ETH2/ETH3 of the EFI. The EFI board can be used to set the ID of a subrack. The default ID of a subrack is 0. The setting is implemented by DIP switches.

DIP switches on the board panel: Figure 6-11 shows the position of the DIP switches on the EFI board.

• The TN18EFI board has a set of five DIP switches whose IDs are ID1-ID5 from the lower bit to the higher bit. Each DIP switch can be used to set a binary digit, 0 or 1. When the DIP switch is toggled to 0, the value of the corresponding bit is set to 0. DIP switches must be toggled to the topmost or the bottommost. Otherwise, the subrack ID cannot be intuitively identified.

• A maximum of 32 states can be set. The value is 00000 by default. "0" indicates the master subrack. The other values indicate slave subracks. As shown in Figure 6-11, the value represented by the ID5-ID1 is 00001, which is 1 in decimal system. That is, the subrack ID is 1.

DIP switches within the board: Figure 6-12 shows the position of the DIP switches on the EFI board.

• The TN18EFI board has a set of eight DIP switches. ID1-ID4 correspond to bits 1-4 of SW2, and ID5-ID8 corresponding to bits 1-4 of SW1. Among these ID values, only ID1-ID5 are valid. ID6-ID8 are reserved. The bits from high to low are ID5-ID1. Each DIP switch can be used to set a binary digit, 0 or 1. When the DIP switch is toggled to ON, the value of the corresponding bit is set to 0.

• A maximum of 32 states can be set. The value is 00000 by default. "0" indicates the master subrack. The other values indicate slave subracks. As shown in Figure 6-12, the value represented by the ID5-ID1 is 00001, which is 1 in decimal system. That is, the subrack ID is 1.

Figure 6-11 Position of the DIP switches on the EFI panel

Figure 6-12 Position of the DIP switches within the EFI board

Figure 6-13 The ID of the subrack: 0-31

The LED front panel of the EFI/SCC indicates the ID of the subrack. The ID of the master subrack is 0 and the ID of the slave subrack ranges from 1 to 31.

On the NMS, the master subrack and the multiple slave subracks are displayed as one NE with one ID and one IP.

Precautions

Changing the subrack ID is a dangerous operation, which may interrupt service.